As far as harvest time is concerned, it is my understanding that not all strains function the same way so beware.. you might only loose potency going too long or harvesting early to get a certain effect. Strain type is the way to go rather than harvest time when trying to achieve a certain effect.
Yep, I realise flowering time will affect potency, the first time I harvested I tried to wait until there were at least some amber trichomes. I ended up waiting about 10 weeks (probably because I wasn't ready to flower and I'm still not using as much light as I had planned for flowering) for strains that should be about 8 weeks (I realise the times breeders specify are more of a guideline). This time I want to try and get mostly cloudy with the remainder clear and no amber trichomes.
Medium term I have C99 growing now with some vegging before being flowered, longer term I have some other sativa dominant seeds to grow. I'm mainly trying to see if there's something I can do short term with this current harvest, I have a fair amount of oil from the previous harvest so even if harvesting early is a problem I can fall back on the previous oil.
I'm sure you've studied which terpenes affect the high and how, but just in case one link:
Terpenes: The Flavors of Cannabis Aromatherapy | Leafly
Limonene will definitely help, i'd try more of that.
Yep, I've seen that page, I'd done a bit of research on terpenes before posting and I've done more since and I'll certainly include limonene
Other than that, more CBD in the extract will balance out the sedative effect. In this way its similar to THCa, they both offer a bit of stimulation.
I'm now getting rather mixed messages regarding CBD. When searching around online I found some information suggesting that CBD can be a sedative and other information suggesting the opposite. From what you've posted I get the impression that you use different amounts of CBD depending on whether it's for day or night use.
Just then I found information suggesting that in low doses CBD should be more alerting and at higher doses (several hundred mg) is should be more sedative. It seems like I should use predominantly Aurora Indica oil for starters as that should be lower in CBD and then possibly try mixing a small amount of the Blue Blood in there for a little more CBD if required.